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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/10/22 12:50:25 UTC

[GitHub] [flink] TsReaper commented on pull request #13636: [FLINK-19641][hive] Optimize parallelism calculating of HiveTableSource by checking file number

TsReaper commented on pull request #13636:
URL: https://github.com/apache/flink/pull/13636#issuecomment-714471424


   > Thanks for contribution, we should not rely on `StatsSetupConst.NUM_FILES`, because in Hive metastore, these stats information is just a hint, and they may not correct.
   > 
   > We can get file numbers from file system directly. You should make a performance testing for that.
   
   Indeed. I've tested the performance of listing the table file directory and its impact is neglectable (at least for TPCDS benchmark).


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